A novel electrochemical sensor based on double-walled carbon nanotubes and graphene hybrid thin film for arsenic(V) detection

Duoc, Phan Nguyen Duc; Binh, Nguyen Hai; Hau, Tran Van; Thanh, Cao Thi; Trinh, Pham Van; Tuyên, Nguyễn Việt; Quynh, Nguyen Van; Tú, Nguyễn Văn; Chinh, Vu Đuc; Thu, Vũ Thị Hạnh; Pham, Thang; Minh, Phan Ngoc; Chuc, Nguyen Van

doi:10.1016/j.jhazmat.2020.123185

Cited by 60 publications

(16 citation statements)

References 63 publications

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“…Unfortunately, these technologies require expensive equipments, professional operators, and are not readily realized on-side detection. In order to solve these problems, colorimetric and electrochemical sensors for As(V) assay have been developed. , However, the accuracy, sensitivity, and background noise interference still need to be improved.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Xiao

Zhang

et al. 2022

Anal. Chem.

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Water pollution presents a significant environmental concern on earth. Herein, due to the serious environmental harmfulness of arsenate [As(V)], an iron phthalocyanine (FePc)induced switchable photocurrent-polarity platform was developed for highly selective assay of As(V). First, magnetic Co 3 O 4 −Fe 3 O 4 cubes were obtained by calcination of the CoFe Prussian blue analogue and then functionalized with oligonucleotide (S1). In the presence of As(V), S1 could be released based on the stronger affinity between As(V) and Co 3 O 4 −Fe 3 O 4 cubes. After magnetic separation by Co 3 O 4 −Fe 3 O 4 cubes, the released S1 was used to trigger the catalytic hairpin assembly (CHA) and hybridization chain reaction, resulting in the formation of lots of G-quadruplex structures on the AgInS 2 /ITO electrode. Then, the capture of FePc by the G-quadruplex led to the switch of the photocurrent polarity of the AgInS 2 /ITO electrode from the anode to the cathode. Thus, As(V) was sensitively assayed with a low detection limit of 1.0 nM and a wide linear response range from 10 nM to 200 μM. This meets the detection requirement of the World Health Organization for the arsenic concentration in drinking water [less than 10 μg L −1 (130 nM)]. In addition, whether it was cationic or anionic interferents except phosphate (PO 4 3− ), only As(V) could generate the cathodic photocurrent, effectively avoiding the false-positive or false-negative results during As(V) assay. Interestingly, As(V) was also simultaneously separated from the detection system by Co 3 O 4 −Fe 3 O 4 magnetic cubes. The proposed photoelectrochemical platform may have a great potential application for the selective detection of As(V) in environmental fields.

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Section: Introductionmentioning

confidence: 99%

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Xiao

Zhang

et al. 2022

Anal. Chem.

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“…However, it is widely distributed in many natural and artificial ecosystems, including geothermal springs ( Hug et al, 2017 ; Mukherjee et al, 2017 ). Due to its toxicity, the World Health Organization has classified As as a carcinogenic pollutant and set its exposure limit to below 10 μg l –1 ( Duoc et al, 2020 ). Over 100 tons of As is discharged every year from geothermal fluids into soils, river streams, and groundwater, thus posing a significant threat to the environment ( Bundschuh and Maity, 2015 ; Wang et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Different Regulatory Strategies of Arsenite Oxidation by Two Isolated Thermus tengchongensis Strains From Hot Springs

Yuan

Qing

et al. 2022

Front. Microbiol.

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Arsenic is a ubiquitous constituent in geothermal fluids. Thermophiles represented by Thermus play vital roles in its transformation in geothermal fluids. In this study, two Thermus tengchongensis strains, named as 15Y and 15W, were isolated from arsenic-rich geothermal springs and found different arsenite oxidation behaviors with different oxidation strategies. Arsenite oxidation of both strains occurred at different growth stages, and two enzyme-catalyzed reaction kinetic models were observed. The arsenite oxidase of Thermus strain 15W performed better oxidation activity, exhibiting typical Michaelis–Menten kinetics. The kinetic parameter of arsenite oxidation in whole cell showed a Vmax of 18.48 μM min–1 and KM of 343 μM. Both of them possessed the arsenite oxidase-coding genes aioB and aioA. However, the expression of gene aioBA was constitutive in strain 15W, whereas it was induced by arsenite in strain 15Y. Furthermore, strain 15Y harbored an intact aio operon including the regulatory gene of the ArsR family, whereas a genetic inversion of an around 128-kbp fragment produced the inactivation of this regulator in strain 15W, leading to the constitutive expression of aioBA genes. This study provides a valuable insight into the adaption of thermophiles to extreme environments.

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“…1–4 All these remarkable properties make graphene a rising star in many fields of application such as in the electronics industry as electronics devices, superconductors, electrochemical sensors, etc. 5–11 However, the nature of graphene also has certain disadvantages such as being easily clumped together by van der Waals forces and π–π interactions. 12,13 In fact, graphene or graphene oxide often has structural defects during fabrication such as fractures, and functional groups attached to the surface of the graphene material.…”

Section: Introductionmentioning

confidence: 99%

Improving the efficiency of n-Si/PEDOT:PSS hybrid solar cells by incorporating AuNP-decorated graphene oxide as a nanoadditive for conductive polymers

et al. 2022

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A novel electrochemical sensor based on double-walled carbon nanotubes and graphene hybrid thin film for arsenic(V) detection

Cited by 60 publications

References 63 publications

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Different Regulatory Strategies of Arsenite Oxidation by Two Isolated Thermus tengchongensis Strains From Hot Springs

Improving the efficiency of n-Si/PEDOT:PSS hybrid solar cells by incorporating AuNP-decorated graphene oxide as a nanoadditive for conductive polymers

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A novel electrochemical sensor based on double-walled carbon nanotubes and graphene hybrid thin film for arsenic(V) detection

Cited by 60 publications

References 63 publications

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co3O4–Fe3O4 Cubes and the Negative-Background Signal Strategy

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co3O4–Fe3O4 Cubes and the Negative-Background Signal Strategy

Different Regulatory Strategies of Arsenite Oxidation by Two Isolated Thermus tengchongensis Strains From Hot Springs

Improving the efficiency of n-Si/PEDOT:PSS hybrid solar cells by incorporating AuNP-decorated graphene oxide as a nanoadditive for conductive polymers

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Product

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Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy